What is the role of CT scanning and MRI in the evaluation of migraine headaches?

Updated: Oct 21, 2019
  • Author: Jasvinder Chawla, MD, MBA; Chief Editor: Helmi L Lutsep, MD  more...
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CT scanning of the head is indicated to rule out intracranial mass or hemorrhage in selected or atypical cases. A negative CT scan may miss some small subarachnoid hemorrhages, tumors, and strokes, particularly those in the posterior fossa. A CT scan without intravenous contrast also may miss some aneurysms. MRI and MRA are more sensitive for the detection of aneurysm or arteriovenous malformation.

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